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13 Cards in this Set
- Front
- Back
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raw data
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numbers and category labels that are collected, but not yet processed
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variable
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a characteristic that varies between individuals
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observational unit
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single individual who participates in a study
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independent variable
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explanatory variable; predictor; covariate
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dependent variable
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response variable
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class
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a category that qualitative data is classified
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class frequency
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number of observations in a data set falling in a given class
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class relative frequency
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class frequency/n
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unimodal histogram
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has one peak on histogram (but can have more than one actual mode)
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normal distribution of frequencies
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the frequencies start low, increases to some maximum point, and then decrease low again with the distribution appearing symmetric
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relative distribution of frequencies
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divide total number of frequencies by individual frequency
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cumulative distribution of frequencies
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summation of a certain frequency and all the frequencies before it
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graphing a histogram
(x-axis, y-axis) |
x-axis: divide measurements into equal intervals
y-axis: gives the frequency of measurements that fall into each interval |
